Yes, that was the eastbound home signal for Stockton Tower. It was replaced with mast mounted signals in January 1999 when the tower was closed, and those have since been replaced with a modern cantilever.

The depot building looks very much the same today, except the Santa Fe emblem has been removed. Taylor Street, which the tracks are in the middle of in the photo is today just a narrow, one lane alley while the busy double track remains with a center and depot side platforms.

I believe there is (or was until recently) a lumber milling operation across the street still...of course that very old looking stack is long gone.

It's #1, Westbound San Francisco Chief destination Richmond, California arriving in Stockton. I worked that train during the Summers and Winter holidays 1965 - 1968 while I attended San Joaquin Delta College and eventually graduated from Fresno State.

The train was heavy with head-end business until 1968, and the train in the photo is not. From the looks of the motive power assignments on his site, the train was assigned to 52-class PA's into Richmond during the 60's up until about 1966.